You can replace the cracked plastic tubes with rubber vacuum line or try to get the plastic tubing at Advance Auto (lengths you cut to size). Either method has been used. Codes can be obtained via key on, key off, key on method. You read the flashes on the CEL. Search the web for more info. It takes some practice or several tries to distinguish between pauses for the next code or just a short pause for the next digit of a particular code.